The MESSENGER spacecraft orbited Mercury for 4 years before crashing into the surface in 2015.
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Neptune has some of the fastest winds in the solar system.
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The International Space Station orbits Earth roughly every 90 minutes.
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The observable universe is about 93 billion light‑years wide.
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The observable universe is about 93 billion light‑years wide.
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The Earth's atmosphere is layered into troposphere, stratosphere, and beyond.
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Venus has surface temperatures hot enough to melt lead.
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The Milky Way galaxy contains billions of stars.
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The light you see from some stars today began traveling before humans existed.
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